Solar charger



FIG. 1 is a top, front and right side perspective view of the solar charger according to our new design;

FIG. 2 is a top plan view thereof, the bottom plan view being a mirror image thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof, the right side elevational view being a mirror image thereof; and,

FIG. 5 is a rear elevational view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

The ornamental design for a solar charger, as shown and described. 